$115 Cheap Flights from Sofia (SOF) to Bilbao (BIO)

View $115 flight on Sun, Feb 8, 2026Opens in a new window

Popular airlines from Sofia Airport (SOF) to Bilbao Airport (BIO)

Cheap Flights from Sofia to Bilbao (SOF-BIO)

Prices were available within the past 7 days and start at $115 for one-way flights and $222 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Wed, Dec 10 - Wed, Dec 17
SOF
Sofia
BIO
Bilbao
$222 Roundtrip, just found
$222
Roundtrip
just found
Select Lufthansa flight, departing Wed, Dec 10 from Sofia to Bilbao, returning Wed, Dec 17, priced at $222 just found
Lufthansa
Sat, Nov 8 - Tue, Nov 11
SOF
Sofia
BIO
Bilbao
$223 Roundtrip, found 4 days ago
$223
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sat, Nov 8 from Sofia to Bilbao, returning Tue, Nov 11, priced at $223 found 4 days ago
Lufthansa
Wed, Dec 10 - Wed, Dec 17
SOF
Sofia
BIO
Bilbao
$231 Roundtrip, just found
$231
Roundtrip
just found
Select Lufthansa flight, departing Wed, Dec 10 from Sofia to Bilbao, returning Wed, Dec 17, priced at $231 just found
Lufthansa
Wed, Dec 10 - Wed, Dec 17
SOF
Sofia
BIO
Bilbao
$240 Roundtrip, just found
$240
Roundtrip
just found
Select Lufthansa flight, departing Wed, Dec 10 from Sofia to Bilbao, returning Wed, Dec 17, priced at $240 just found
Lufthansa
Sat, Nov 8 - Tue, Nov 11
SOF
Sofia
BIO
Bilbao
$241 Roundtrip, found 4 days ago
$241
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sat, Nov 8 from Sofia to Bilbao, returning Tue, Nov 11, priced at $241 found 4 days ago
Lufthansa
Wed, Dec 10 - Wed, Dec 17
SOF
Sofia
BIO
Bilbao
$249 Roundtrip, just found
$249
Roundtrip
just found
Select Lufthansa flight, departing Wed, Dec 10 from Sofia to Bilbao, returning Wed, Dec 17, priced at $249 just found
Austrian Airlines
Wed, Dec 10 - Wed, Dec 17
SOF
Sofia
BIO
Bilbao
$256 Roundtrip, just found
$256
Roundtrip
just found
Select Austrian Airlines flight, departing Wed, Dec 10 from Sofia to Bilbao, returning Wed, Dec 17, priced at $256 just found
Turkish Airlines
Wed, Dec 10 - Wed, Dec 17
SOF
Sofia
BIO
Bilbao
$365 Roundtrip, just found
$365
Roundtrip
just found
Select Turkish Airlines flight, departing Wed, Dec 10 from Sofia to Bilbao, returning Wed, Dec 17, priced at $365 just found
Iberia
Sun, Feb 8 - Tue, Feb 10
SOF
Sofia
BIO
Bilbao
$428 Roundtrip, found 4 days ago
$428
Roundtrip
found 4 days ago
Select Iberia flight, departing Sun, Feb 8 from Sofia to Bilbao, returning Tue, Feb 10, priced at $428 found 4 days ago
KLM
Sat, Nov 8 - Tue, Nov 11
SOF
Sofia
BIO
Bilbao
$615 Roundtrip, found 4 days ago
$615
Roundtrip
found 4 days ago
Select KLM flight, departing Sat, Nov 8 from Sofia to Bilbao, returning Tue, Nov 11, priced at $615 found 4 days ago

Alternative airports near Bilbao

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Bilbao Airport BIO. Cheapest and Closest option available. Average driving time to city center is 13 minutes. Flights from $337
BIO
Bilbao Airport
CheapestClosest
Average driving time to city center13 min
Flights from $337

Frequently asked questions

How much does a flight from Sofia Airport (SOF) to Bilbao Airport (BIO) cost?
Secure a cheap one-way flight from $115 or cheap return flight from $222 from Sofia Airport (SOF) to Bilbao Airport (BIO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Sofia Airport (SOF) to Bilbao Airport (BIO)?
Flying in December can help you save, as it's the cheapest month for flights between SOF and BIO. You'll often find the lowest prices during off-peak months.
What is the cheapest airline that flies from Sofia Airport (SOF) to Bilbao Airport (BIO)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SOF to BIO. Then, sort your results by "Price (lowest to highest)" to snag a good deal.
How many flights per day from Sofia Airport (SOF) to Bilbao Airport (BIO)?
There are no daily nonstop flights available from Sofia Airport (SOF) to Bilbao Airport (BIO). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time.
What day of the week has the most flights from SOF to BIO?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sofia Airport (SOF) to Bilbao Airport (BIO)?
To arrive at Bilbao Airport (BIO) on time, select a flight that takes off from Sofia Airport (SOF) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Sofia Airport (SOF) to Bilbao Airport (BIO) last-minute?
Waiting until right before your break to book your flight from SOF to BIO generally means paying more. While you might find some last-minute deals, they aren't always guaranteed. Allow some flexibility in your schedule for a better chance of getting a bargain.
Is it cheaper to book a SOF to BIO flight and hotel package?
Compared with arranging hotels and flights separately, booking a SOF to BIO flight and hotel package with Expedia could result in significant savings. What's more, having it all in one place takes the hassle out of planning your trip. Simply secure your flights and choose from our wide range of hotels, then tailor your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Sofia Airport (SOF) to Bilbao Airport (BIO)?
Typically, it's possible to reschedule or cancel your SOF to BIO flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Sofia
Destination airport
Bilbao
Roundtrip price
$222
Distance
1324 mi

Book with confidence

Sofia to Bilbao Flights

The cheapest times to fly from Sofia to Bilbao

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Sofia to Bilbao are during the month of December. You can find some of the cheapest flights from Sofia to Bilbao with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sofia to Bilbao

Sunday is one of the best days to book for cheap flights from Sofia to Bilbao: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Sofia to Bilbao

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Sofia to Bilbao in 2025. You can also book with separate airlines for your outbound and return journeys, from $115 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Sofia to Bilbao flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Sofia to Bilbao airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Sofia to Bilbao Flights

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*Available to One Key members.